J/ApJ/932/47 ALMA CO obs. of the 30 Dor molecular cloud complex (Wong+, 2022)
The 30 Doradus molecular cloud at 0.4pc resolution with the Atacama Large
Millimeter/submillimeter Array: physical properties and the boundedness of CO-
emitting structures.
Wong T., Oudshoorn L., Sofovich E., Green A., Shah C., Indebetouw R.,
Meixner M., Hacar A., Nayak O., Tokuda K., Bolatto A.D., Chevance M.,
De Marchi G., Fukui Y., Hirschauer A.S., Jameson K.E., Kalari V.,
Lebouteiller V., Looney L.W., Madden S.C., Onishi T., Roman-Duval J.,
Rubio M., Tielens A.G.G.M.
<Astrophys. J., 932, 47 (2022)>
=2022ApJ...932...47W 2022ApJ...932...47W
ADC_Keywords: Magellanic Clouds; Star Forming Region; Molecular clouds;
Carbon monoxide; Space velocities; Interstellar medium
Keywords: Interstellar medium ; Magellanic Clouds ; Millimeter astronomy ;
Giant molecular clouds ; Star forming regions
Abstract:
We present results of a wide-field (approximately 60x90pc) Atacama
Large Millimeter/submillimeter Array mosaic of CO(2-1) and 13CO(2-1)
emission from the molecular cloud associated with the 30 Doradus
star-forming region in the Large Magellanic Cloud (LMC). Three main
emission complexes, including two forming a bow-tie-shaped structure
extending northeast and southwest from the central R136 cluster, are
resolved into complex filamentary networks. Consistent with previous
studies, we find that the central region of the cloud has higher line
widths at a fixed size relative to the rest of the molecular cloud and
to other LMC clouds, indicating an enhanced level of turbulent
motions. However, there is no clear trend in gravitational boundedness
(as measured by the virial parameter) with distance from R136.
Structures observed in 13CO are spatially coincident with filaments
and are close to a state of virial equilibrium. In contrast, 12CO
structures vary greatly in virialization, with low CO surface
brightness structures outside of the main filamentary network being
predominantly unbound. The low surface brightness structures
constitute ∼10% of the measured CO luminosity; they may be shredded
remnants of previously star-forming gas clumps, or alternatively the
CO-emitting parts of more massive, CO-dark structures.
Description:
The data presented in this paper were collected for ALMA Cycle 7
project 2019.1.00843.S in 2019 October to December.
We obtain a sensitive, high-resolution (1.75" beam) map of the 30 Dor
giant molecular cloud complex across an extent of ∼100pc using the CO
J=2-1 and 13CO J=2-1 transitions.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
05 38 35.99 -69 05 11.0 30 Dor = NAME 30 Dor Nebula
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 133 1434 All resolved structures in 12CO ALMA 30Dor cube
table2.dat 129 254 All resolved structures in 13CO ALMA 30Dor cube
table3.dat 129 142 SCIMES clumps in 12CO ALMA 30Dor cube
table4.dat 126 61 SCIMES clumps in 13CO ALMA 30Dor cube
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See also:
II/305 : SAGE LMC and SMC IRAC Source Catalog (IPAC 2009)
J/AJ/136/18 : LMC SAGE. New candidate YSOs (Whitney+, 2008)
J/ApJS/184/172 : High- and intermediate-mass YSOs in the LMC (Gruendl+, 2009)
J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)
J/ApJ/703/736 : Clump properties in the LMC 30 Dor region (Pineda+, 2009)
J/ApJS/197/16 : CO observations of LMC molecular clouds (MAGMA). (Wong+, 2011)
J/A+A/558/A134 : VLT-FLAMES Tarantula Survey. 30Dor stars (Doran+, 2013)
J/ApJ/774/73 : ALMA CO observations of 30 Dor (Indebetouw+, 2013)
J/AJ/148/124 : Herschel key program Heritage (Seale+, 2014)
J/A+A/574/A13 : VFTS. B-type stars classification and RV (Evans+, 2015)
J/ApJS/222/11 : Hubble Tarantula Treasury Project (HTTP). III. (Sabbi+, 2016)
J/AJ/156/98 : Runaway stars in the 30 Dor region of the LMC (Platais+, 2018)
J/A+A/621/A62 : 4 LMC SFRs velocity profile maps (Okada+, 2019)
J/MNRAS/500/4257 : Dense cores in Serpens region from HGBS (Fiorellino+, 2021)
J/MNRAS/503/292 : NIR photometry of the core of R136 (Khorrami+, 2021)
J/A+A/649/L8 : Extreme adaptive optics astrometry of R136 (Khorrami+, 2021)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq [1/1434] Structure number in RA order
6- 13 F8.5 deg RAdeg [84.57/84.82] Center R.A. (J2000)
15- 23 F9.5 deg DEdeg [-69.15/-69] Center Decl. (J2000)
25- 30 F6.2 km.s-1 vLSR [234/278] Mean LSR velocity
32- 38 F7.2 Jy.km.s-1 F12CO [0.12/7069] 12CO flux within structure
40- 44 F5.2 arcsec sigMaj [0.8/38.6] rms major axis width,
σmaj
46- 50 F5.2 arcsec sigMin [0.74/20.1] rms minor axis width,
σmin
52- 58 F7.2 deg PA [-180/180] PA measured counterclockwise
from west, φ
60- 65 F6.2 pc2 Area [0.3/508] Projected area of clump
67- 72 F6.3 [pc] logRad [-1.22/1.1] Log of deconvolved radius
74- 78 F5.3 [pc] e_logRad [0.04/0.82] Error in logRad
80- 85 F6.3 [km/s] logsigV [-0.81/0.74] Log of rms linewidth,
logσν
87- 91 F5.3 [km/s] e_logsigV [0.04/0.3] Error in logsigV
93- 96 F4.2 [Msun] logMco [0.1/4.88] Log of CO-based mass with
X2=1.6
98- 101 F4.2 [Msun] e_logMco [0.04/0.1] Error in logMco
103- 106 F4.2 [Msun] logMvir [1/5.53] Log of virial mass
108- 111 F4.2 [Msun] e_logMvir [0.07/0.9] Error in logMvir
113- 118 F6.3 [-] logaVir [-0.97/2.13] Log of virial parameter
Mvir/Mco
120- 124 F5.3 [-] e_logaVir [0.08/0.9] Error in logaVir
126- 131 F6.2 arcsec Offset [8.8/334.4] Angular offset from RMC 136
(84.67625, -69.100917), θoff (G1)
133 A1 --- DType Structure type [(T)runk,(B)ranch,(L)eaf]
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/254] Structure number in RA order
5- 12 F8.5 deg RAdeg [84.5/84.8] Center R.A. (J2000)
14- 22 F9.5 deg DEdeg [-69.2/-69] Center Decl (J2000)
24- 29 F6.2 km.s-1 vLSR [236/260] Mean LSR velocity
31- 36 F6.2 Jy.km.s-1 F13CO [0.4/203] 13CO flux within structure
38- 42 F5.2 arcsec sigMaj [0.86/17] rms major axis width,
σmaj
44- 47 F4.2 arcsec sigMin [0.74/5] rms minor axis width,
σmin
49- 55 F7.2 deg PA [-180/180] PA measured counterclockwise
from west, φ
57- 61 F5.2 pc2 Area [0.6/35.41] Projected area of structure
63- 68 F6.3 [pc] logRad [-1.1/0.55] Log of deconvolved radius
70- 74 F5.3 [pc] e_logRad [0.04/0.7] Error in logRad
76- 81 F6.3 [km/s] logsigV [-0.73/0.5] Log of rms linewidth,
logσν
83- 87 F5.3 [km/s] e_logsigV [0.04/0.2] Error in logsigV
89- 92 F4.2 [Msun] logMlte [1.45/4.22] Log of LTE mass using
H2/13CO=3e6
94- 97 F4.2 [Msun] e_logMlte [0.04/0.05] Error in logMlte
99- 102 F4.2 [Msun] logMvir [0.89/4.4] Log of virial mass
104- 107 F4.2 [Msun] e_logMvir [0.07/0.7] Error in Mvir
109- 114 F6.3 [-] logaVir [-0.94/1] Log of virial parameter
Mvir/Mlte
116- 120 F5.3 [-] e_logaVir [0.08/0.7] Error in logaVir
122- 127 F6.2 arcsec Offset [8.6/294] Angular offset from RMC 136
(84.67625, -69.100917) (G1)
129 A1 --- DType Structure type [(T)runk,(B)ranch,(L)eaf]
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/142] Clump number in RA order
5- 12 F8.5 deg RAdeg [84.57/84.82] Center R.A. (J2000)
14- 22 F9.5 deg DEdeg [-69.15/-69] Center Decl. (J2000)
24- 29 F6.2 km.s-1 vLSR [235/278] Mean LSR velocity
31- 37 F7.2 Jy.km.s-1 F12CO [0.39/2659] 12CO flux within clump
39- 43 F5.2 arcsec sigMaj [1.14/29.87] rms major axis width,
σmaj
45- 49 F5.2 arcsec sigMin [0.74/14.25] rms minor axis width,
σmin
51- 57 F7.2 deg PA [-178.83/179.37] PA measured
counterclockwise from west, φ
59- 64 F6.2 pc2 Area [0.79/185.38] Projected area of clump
66- 71 F6.3 [pc] logRad [-0.84/0.98] Log of deconvolved radius
73- 77 F5.3 [pc] e_logRad [0.04/0.56] Error in logRad
79- 84 F6.3 [km.s-1] logsigV [-0.4/0.6] Log of rms linewidth,
logσν
86- 90 F5.3 [km.s-1] e_logsigV [0.04/0.12] Error in logsigV
92- 95 F4.2 [Msun] logMco [0.62/4.45] Log of CO-based mass with
X2=1.6
97- 100 F4.2 [Msun] e_logMco [0.04/0.05] Error in logMco
102- 105 F4.2 [Msun] logMvir [1.7/4.92] Log of virial mass
107- 110 F4.2 [Msun] e_logMvir [0.07/0.57] Error in logMvir
112- 116 F5.3 [-] logaVir [0.07/2.13] Log of virial parameter
Mvir/Mco
118- 122 F5.3 [-] e_logaVir [0.08/0.57] Error in logaVir
124- 129 F6.2 arcsec Offset [8.82/331.49] Angular offset from RMC 136
(84.67625, -69.100917) (G1)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/61] Clump number in RA order
5- 12 F8.5 deg RAdeg [84.59348/84.79461] Center R.A. (J2000)
14- 22 F9.5 deg DEdeg [-69.13365/-69.02183] Center Decl (J2000)
24- 29 F6.2 km.s-1 vLSR [236.11/259.14] Mean LSR velocity
31- 36 F6.2 Jy.km.s-1 F13CO [1.0/133.5] 13CO flux within clump
38- 41 F4.2 arcsec sigMaj [1.08/7.85] rms major axis width
σmaj
43- 46 F4.2 arcsec sigMin [0.77/3.6] rms minor axis width
σmin
48- 54 F7.2 deg PA [-175.75/179.97] PA measured CCW from west
56- 60 F5.2 pc2 Area [1.24/14.59] Projected area of clump
62- 67 F6.3 [pc] logRad [-0.53/0.37] Log of deconvolved radius
69- 73 F5.3 [pc] e_logRad [0.04/0.34] Error in logRad
75- 80 F6.3 [km.s-1] logsigV [-0.58/0.48] Log of rms linewidth
82- 86 F5.3 [km.s-1] e_logsigV [0.04/0.08] Error in logsigV
88- 91 F4.2 [Msun] logMlte [1.81/4.07] Log of LTE mass using
H2/13CO=3e6
93- 96 F4.2 [Msun] e_logMlte [0.04/0.05] Error in logMlte
98- 101 F4.2 [Msun] logMvir [1.71/4.03] Log of virial mass
103- 106 F4.2 [Msun] e_logMvir [0.07/0.35] Error in logMvir
108- 113 F6.3 [-] logaVir [-0.63/0.99] Log of virial parameter
Mvir/Mlte
115- 119 F5.3 [-] e_logaVir [0.08/0.35] Error in logaVir
121- 126 F6.2 arcsec Offset [8.62/287.42] Angular offset from RMC 136
(84.67625, -69.100917) (G1)
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Global notes:
Note (G1): Projected angular distance from the R136 cluster (θoff)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Esther Collas [CDS] 27-May-2024